<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>CatchBook</title>
</head>
<body>
<button type="button" id="bt" >点我</button>
<div></div>

<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
    $("#bt").click(function(){
        alert("你好")
      $.get("/catchinfo/a", function(result){
          alert(result)
        $("div").html(result);
      })
    })
})
</script>
</body>
</html>